For Engineers Preparing for LLD and Machine Coding Rounds

Nail Your Low Level Design Interview

LLD rounds test your ability to write clean, extensible, production-quality code under time pressure. Practice with engineers who evaluate these rounds at companies like Microsoft, Flipkart, and Atlassian.

Expert mentors available 60 min sessions 4 mentors online

Book a Mock LLD Interview

Mentors from top companies

Sound Familiar?

You're not alone. These are the challenges we hear most.

OOP Knowledge Does Not Equal Interview Performance

You understand SOLID principles and design patterns in theory, but applying them to a new problem under time pressure in a live interview is a completely different skill.

Unclear How Far to Take the Design

Should you write fully working code or stop at class diagrams? How many edge cases matter? Different companies expect different deliverables and you do not know the bar.

Code Gets Messy Under Pressure

When the clock is ticking, your clean design intentions collapse into tangled classes and duplicated logic. You need practice maintaining code quality while moving fast.

Design. Code. Get Expert-Level Feedback.

Your mentor presents a real LLD problem like a parking lot, elevator system, chess game, or something tailored to your target company. You design the class structure and implement it live while your mentor evaluates your OOP decisions, extensibility, naming, and code organization.

Book a Mock LLD Interview

Master the LLD Framework

Learn a repeatable approach to LLD problems: requirement gathering, identifying entities, defining relationships, applying patterns, and writing clean implementation.

Real-Time Design Critique

Your mentor reviews your class hierarchy, interface choices, and pattern usage as you build, the same way a real interviewer evaluates you silently.

Company-Calibrated Problems

LLD rounds vary significantly across companies. Your mentor selects problems and sets expectations matching your target company and level.

Build Speed Without Sacrificing Quality

Practice teaches you to make quick, confident design decisions without overthinking, the key skill that separates strong performers in machine coding rounds.

How It Works

Get started in three simple steps

Choose Your Mentor

Browse mentors by company experience, expertise, and availability. Every mentor is vetted and actively working in the industry.

Book a Session

Select a time slot that works for you. Sessions are conducted over video call with screen sharing for hands-on practice.

Get Results

Receive personalized feedback, actionable strategies, and follow-up resources to accelerate your career goals.

Meet Our Mentors

Learn from engineers at the world's top companies

Vinay Bansal

Senior Engineering Leader

Google Nike Startup

Sandeep Kochhar

CTO

Paint Minds Consulting Pvt Ltd Honeywell IBM

Nishant Kumar

Principal Engineer at Microsoft

Microsoft Rackspace Ericsson

Gregory Bates

VP of Engineering, Artificial Intelligence at The Coca-Cola...

Mastercard Kasier Permanente Coca-Cola

These are just a few of our expert mentors. Search for your perfect match →

Success Stories

See how engineers like you achieved their goals

“

My mentor helped me navigate a challenging career transition with genuine empathy. Every session was focused on my specific goals, and the personalized guidance gave me the confidence to land a senior role at a top-tier company.

Ana Reyes

Software Engineer

“

The mentorship I received was transformative. My mentor brought deep technical expertise and exceptional communication skills that helped me master system design. I went from struggling with interviews to receiving multiple offers.

Danish Kalim

Software Engineer

“

After months of preparation on my own, I knew I needed expert guidance. Choosing BeTopTen was the best decision - my mentor's targeted feedback on my coding and behavioral interviews directly led to my promotion.

Amruta Rathod

Senior Developer

Frequently Asked Questions

Everything you need to know about Low Level Design Interview

What is the difference between LLD and system design?

System design (HLD) focuses on distributed architecture: services, databases, caches, load balancers. Low level design focuses on object-oriented class structure within a single service: classes, interfaces, design patterns, and clean code. Both are common interview rounds but test very different skills.

What programming languages work for LLD practice?

Java, Python, C++, and C# are the most common choices for LLD interviews. Your mentor will work in whatever language you plan to use in your real interview.

Is this the same as a machine coding round?

Machine coding rounds are a variant of LLD where you write fully working code in 60-90 minutes. Some companies focus on class design only. Your mentor will match the format used by your target company.

What design patterns should I know?

Your mentor will cover the patterns most relevant to interview problems: Strategy, Observer, Factory, Singleton, Command, State, and Decorator. The focus is on knowing when to apply each pattern, not memorizing all 23 GoF patterns.

Do I need to write working code or just class diagrams?

It depends on your target company. Some expect a UML-level class diagram. Others want compilable code. Your mentor will set the right expectations and evaluate you accordingly.

Low Level Design Interview Find Your Mentor